Adding a UISegmentedControl to UINavigationBar - ios

Question

I try to add a UISegmentedControl to the UINavigationBar but when running, the UISegmentedControl is not showing.
here is a code
Appdelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
MainViewController2 *mainVC = [[MainViewController2 alloc] init];
self.window.rootViewController = mainVC;
return YES;
}
MainViewController2.m
#import "MainViewController2.h"
#interface MainViewController2 ()
#end
#implementation MainViewController2
#synthesize firstVC;
#synthesize segment;
- (void)viewDidLoad {
[super viewDidLoad];
[self initSegment];
}
-(void)initSegment{
segment.frame =CGRectMake(10,100,199,100);
segment = [[UISegmentedControl alloc]initWithItems:#[#"seg1", #"seg2", #"seg3"]];
self.navigationItem.titleView = segment;
[self.view addSubview:firstVC];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end

Answer 1

You can directly add segment in navigation bar as a title view, using storyboard.
Here is programatically using your code:
Note: Don't forget to embed your view controller with navigation controller. (Either programatically or using storyboard)
- (void)viewDidLoad {
[super viewDidLoad];
[self initSegment];
}
-(void)initSegment{
UISegmentedControl *segment = [[UISegmentedControl alloc]initWithItems:#[#"seg1", #"seg2", #"seg3"]];
self.navigationItem.titleView = segment;
}
Add following code to your AppDelegate.m
//
// AppDelegate.m
// OBJC_Test
//
// Created by Krunal on 10/10/17.
// Copyright © 2018 Krunal. All rights reserved.
//
#import "AppDelegate.h"
#interface AppDelegate ()
#end
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
/*
UIViewController *viewController = [[UIViewController alloc] init];
viewController.view.frame = self.window.bounds;
viewController.view.backgroundColor = [UIColor whiteColor];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
*/
//or try this according to your code
MainViewController2 *mainVC = [[MainViewController2 alloc] init];
mainVC.view.frame = self.window.bounds;
mainVC.view.backgroundColor = [UIColor whiteColor];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:mainVC];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
return YES;
}

Answer 2

Add this code to your AppDelegate.m in the didFinishLaunchingWithOptions function to embed a navigation controller programmatically.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
MainViewController2 *mainVC = [[MainViewController2 alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:mainVC];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
return YES;
}

Answer 3

Below code might be useful to you
AppDelegate.h
//Declare UINavigationcontroller
#property (strong, nonatomic) UINavigationController *navigationController;
AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.backgroundColor = [UIColor whiteColor];
MainViewController2 *mainVC = [[MainViewController2 alloc] init];
self.navigationController = [[UINavigationController alloc] initWithRootViewController:mainVC];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
In MainViewController2.m use below code
#import "MainViewController2.h"
#interface MainViewController2 ()
#end
#implementation MainViewController2
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self setUpSegmentalController];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)setUpSegmentalController{
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 250, 44)];
//view.backgroundColor = [UIColor redColor];
NSArray *itemArray = [NSArray arrayWithObjects: #"One", #"Two", #"Three", nil];
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:itemArray];
segmentedControl.frame = CGRectMake(0, 0, 250, 44);
segmentedControl.segmentedControlStyle = UISegmentedControlStylePlain;
[segmentedControl addTarget:self action:#selector(segmentControlAction:) forControlEvents: UIControlEventValueChanged];
segmentedControl.selectedSegmentIndex = 1;
[view addSubview:segmentedControl];
self.navigationItem.titleView = view;
}
- (void)segmentControlAction:(UISegmentedControl *)segment
{
NSLog(#"selectedSegmentIndex-----%ld",segment.selectedSegmentIndex);
if(segment.selectedSegmentIndex == 0)
{
// code for the first button
}
}

Answer 4

Use this code.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
MainViewController2 *mainVC = [[MainViewController2 alloc] init];
self.window.rootViewController = mainVC;
[self.window makeKeyAndVisible];
return YES;
}